Today's Message Index:
----------------------
1. 02:36 PM - Check your wing to fuselage fittings for tightness! (mppalmer@aol.com)
2. 03:40 PM - Re: Check your wing to fuselage fittings for tightness! (Todd Copeland)
3. 05:18 PM - Re: Check your wing to fuselage fittings for tightness! (Dick Gossen)
4. 07:04 PM - Re: Check your wing to fuselage fittings for tightness! (Craymondw@aol.com)
5. 08:27 PM - =?utf-8?B?UmU6IEdsYXNhaXItTGlzdDogQ2hlY2sgeW91ciB3aW5nIHRvIGZ1c2VsYWdlIGZpdHRpbmdzIGZvciB0aWdodG5lc3Mh? (=?utf-8?B?cm9iaW4wMkBtaW5kc3ByaW5nLmNvbQ==?=)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Check your wing to fuselage fittings for tightness! |
We just completed our 16th "annual" inspection. (17th year of flying,
3300 hrs.) I had rechecked the torque on the front and rear wing to
fuselage fittings about seven to ten years ago, but to my surprise, the
front screws took another quarter turn this time. The rear bolts were
still pretty tight but needed an eighth of a turn.
I'm thinking that installing Countersunk Tinnerman washers on the front
screws (which the factory called for in a SB and then later rescinded)
might be a good idea. I'm guessing the screw heads are crushing the
glass over time and, as with a wood prop and crushing fibers, need
constant re-torquing?
(We also checked the engine mount to firewall torque years ago. Those
bolts also needed a quarter turn more back then.)
FWIW, we fly straight & level. No aerobatics.
P.S. The plane is still for sale. glasairforsale,freevar.com
Hope this helps,
Mike Palmer <><
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Check your wing to fuselage fittings for tightness! |
With 3300 hours tightening them once doesn't sound too bad. Ironically, I just
drilled these very holes to mount the wing on my glasair 3 today!
Did you mark the nuts when you installed them to have a reference? This way you
can tell if they are backing off or if indeed they are working into the fiberglass.
Would be useful to know this one. Either way, 17 years and 3300 hours seems
like quite a bit of flying to only need that small tweak. Good luck with
the sale, too bad you are leaving the ranks of glasairs.
Todd
Sent from my iPad
On Jun 4, 2012, at 5:06 PM, mppalmer@aol.com wrote:
>
> We just completed our 16th "annual" inspection. (17th year of flying, 3300 hrs.)
I had rechecked the torque on the front and rear wing to fuselage fittings
about seven to ten years ago, but to my surprise, the front screws took another
quarter turn this time. The rear bolts were still pretty tight but needed an
eighth of a turn.
>
> I'm thinking that installing Countersunk Tinnerman washers on the front screws
(which the factory called for in a SB and then later rescinded) might be a good
idea. I'm guessing the screw heads are crushing the glass over time and, as
with a wood prop and crushing fibers, need constant re-torquing?
>
> (We also checked the engine mount to firewall torque years ago. Those bolts also
needed a quarter turn more back then.)
>
> FWIW, we fly straight & level. No aerobatics.
>
> P.S. The plane is still for sale. glasairforsale,freevar.com
>
> Hope this helps,
>
> Mike Palmer <><
>
>
>
>
>
>
>
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Check your wing to fuselage fittings for tightness! |
Thanks, Mike. I'll check 'em.
Dick Gossen
N90GG
22 years flying/1900 hours
On Jun 4, 2012, at 4:06 PM, mppalmer@aol.com wrote:
>
> We just completed our 16th "annual" inspection. (17th year of flying, 3300 hrs.)
I had rechecked the torque on the front and rear wing to fuselage fittings
about seven to ten years ago, but to my surprise, the front screws took another
quarter turn this time. The rear bolts were still pretty tight but needed an
eighth of a turn.
>
> I'm thinking that installing Countersunk Tinnerman washers on the front screws
(which the factory called for in a SB and then later rescinded) might be a good
idea. I'm guessing the screw heads are crushing the glass over time and, as
with a wood prop and crushing fibers, need constant re-torquing?
>
> (We also checked the engine mount to firewall torque years ago. Those bolts also
needed a quarter turn more back then.)
>
> FWIW, we fly straight & level. No aerobatics.
>
> P.S. The plane is still for sale. glasairforsale,freevar.com
>
> Hope this helps,
>
> Mike Palmer <><
>
>
>
>
>
>
>
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Check your wing to fuselage fittings for tightness! |
I talked to friend from Germany that built fiber glass yachts beginning in
the late 1950's through the late 1970's. Now he produces fiber glass parts
for aircraft ranging from wheel pants to wing tips. I remember him
telling me that resin continues to cure even after it's initial cure until it
eventually disintegrates. Don't worry because that will take a few hundred
years or more. He reported the resin cures in a curve that slowly drops off
over time. I would imagine that as the resin cures over lets say the first
several years that it may also shrink. Has anyone made any studies or taken
any measurements? And could this be the reason for screws and bolts
becoming loose? Back in 1996 I had my nose wheel assembly part company on my 1991
Glasair 2S Ft when we landed on grass growing on a sandy type of soil and
it flung into my right main causing the wing to drop on the dangling right
main strut causing the outer bottom skin to dent a little. Those original
3/16 bolts holding on the nose wheel trunions stretched until they snapped
causing the nose wheel assembly to part company. When I had the wing in the
shop and began to sand it to scarf in layers of cloth I found I couldn't
make any progress sanding it by hand. So I used a body grinder beginning with
150 grit paper and nothing happened, I kept switching paper until I ended
using 80 steel grit!! I found grinding through the factory layers harder
than grinding through aircraft sheet aluminum. My German friend asked me if I
had built a tank!!
Here is a hint. In case you have to make a fiber glass repair,
after you use the heavy cloth and it has cured use a very light fiber glass
cloth used on model aircraft as a finishing layer to cover up the weave of
the heavier factory glass cloth weave. After that spray it with a two part
feather fill and block sand it out.
In a message dated 6/4/2012 5:37:03 P.M. Eastern Daylight Time,
mppalmer@aol.com writes:
--> Glasair-List message posted by: mppalmer@aol.com
We just completed our 16th "annual" inspection. (17th year of flying,
3300 hrs.) I had rechecked the torque on the front and rear wing to
fuselage fittings about seven to ten years ago, but to my surprise, the
front screws took another quarter turn this time. The rear bolts were
still pretty tight but needed an eighth of a turn.
I'm thinking that installing Countersunk Tinnerman washers on the front
screws (which the factory called for in a SB and then later rescinded)
might be a good idea. I'm guessing the screw heads are crushing the
glass over time and, as with a wood prop and crushing fibers, need
constant re-torquing?
(We also checked the engine mount to firewall torque years ago. Those
bolts also needed a quarter turn more back then.)
FWIW, we fly straight & level. No aerobatics.
P.S. The plane is still for sale. glasairforsale,freevar.com
Hope this helps,
Mike Palmer <><
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | =?utf-8?B?UmU6IEdsYXNhaXItTGlzdDogQ2hlY2sgeW91ciB3aW5nIHRvIGZ1c2VsYWdlIGZpdHRpbmdzIGZvciB0aWdodG5lc3Mh? |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Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|